President Donald Trump on Sunday night mocked Democratic Sen. Elizabeth Warren’s New Years Eve Instagram announcement that she was taking a step toward running for president in 2020.

Trump also attacked her claims of Native American heritage.

The president tweeted that if her “husband had dressed in full Indian garb it would have been a smash.”

If Elizabeth Warren, often referred to by me as Pocahontas, did this commercial from Bighorn or Wounded Knee instead of her kitchen, with her husband dressed in full Indian garb, it would have been a smash! pic.twitter.com/D5KWr8EPan

He continued in a subsequent tweet: “Best line in the Elizabeth Warren beer catastrophe is, to her husband, ‘Thank you for being here. I’m glad you’re here’ It’s their house, he’s supposed to be there!”

Warren has faced accusations of exaggerating her Native American heritage to benefit from affirmative action programs during her time as a law professor at Harvard University, but there’s no record of Warren taking advantage of any such affirmative action programs at any point during her long academic career.

This has not stopped Trump from hammering the senator from Massachusetts on her claims.

Trump has reveled in nicknaming Warren “Pocahontas.”

In July last year, the president said he’d give $1 million to Warren’s favorite charity if she took a DNA test proving she has Native American heritage. Warren took the test and released DNA results suggesting she has some Native American heritage.